Nick Senzel, the Reds top prospect, will miss the remainder of the season after it was determined Saturday he would need surgery to repair a torn tendon in his right index finger.

Playing at Triple-A Louisville, Senzel was pulled before his first at-bat in Friday's game. He fielded a ground ball at second base and had another play throwing to the plate in the top of the first inning where he apparently suffered the injury.

Senzel is expected to have surgery on his finger Tuesday. The Reds didn't release a timeline for his recovery, but there is hope in the organization that he could play in the Arizona Fall League, which begins in October, or winter ball.

“It had been a challenging season from the start but it has made me grow,” Senzel wrote on Twitter. “The news this morning was very unfortunate but I was prepared mentally on how to handle it whether good or bad.

"I had a goal this season and it was to make it to the big leagues and help the Cincinnati Reds win ballgames, although I did not fulfill this goal it will not stop my drive to continue to fulfill my dream.”

Senzel was hitting .310 with six homers and 25 RBI in 44 games at Louisville. He had nine multi-hit games since June 9, drilling a pair of home runs in Thursday’s game.

He's ranked as the No. 6 prospect by MLB.com and No. 7 prospect by Baseball America.

Throughout the first few months of the season, the Reds didn't call up Senzel to the Major League roster because they wanted him to play every day. Primarily a second and third baseman, he was blocked on the big-league roster by potential All-Stars Eugenio Suarez and Scooter Gennett.

Senzel, the No. 2 pick in the 2016 MLB Draft, missed nearly a month earlier this season dealing with vertigo. Returning at the end of May, he posted a .387 batting average and .434 on-base percentage in his first 19 games in June.

Reds interim manager Jim Riggleman said Saturday he didn't have any specific conversations with the front office about promoting Senzel but he received general updates about his play.

"You just got a sense that he might be here before September," Riggleman said, "and certainly, in all likelihood, in September at least."

Senzel, who will turn 23 on Friday, is not on the Reds' 40-man roster.